Dependency Injection is a technique that solves certain problems but also introduces new challenges. These challenges are then addressed by a DI (Dependency Injection) container, which requires you to adopt a new perspective on object-oriented design.
If the problems that DI solves do not bother you, then you might perceive its implementation as an unnecessary hassle, particularly because it necessitates learning a new approach to object-oriented design.
However, it seems that if you are not bothered by the issues DI addresses, you have a serious problem. Which you will realize once you discover it.